/// <summary>
/// Encode a <seealso cref="ManagedImage"/> object into a byte array
/// </summary>
/// <param name="image">The <seealso cref="ManagedImage"/> object to encode</param>
/// <param name="lossless">true to enable lossless conversion, only useful for small images ie: sculptmaps</param>
/// <returns>A byte array containing the encoded Image object</returns>
public static byte[] Encode(ManagedImage image, bool lossless)
{
if (
(image.Channels & ManagedImage.ImageChannels.Color) == 0 ||
((image.Channels & ManagedImage.ImageChannels.Bump) != 0 && (image.Channels & ManagedImage.ImageChannels.Alpha) == 0))
throw new ArgumentException("JPEG2000 encoding is not supported for this channel combination");
MarshalledImage marshalled = new MarshalledImage();
// allocate and copy to input buffer
marshalled.width = image.Width;
marshalled.height = image.Height;
marshalled.components = 3;
if ((image.Channels & ManagedImage.ImageChannels.Alpha) != 0) marshalled.components++;
if ((image.Channels & ManagedImage.ImageChannels.Bump) != 0) marshalled.components++;
if (!LibslAllocDecoded(ref marshalled))
throw new Exception("LibslAllocDecoded failed");
int n = image.Width * image.Height;
if ((image.Channels & ManagedImage.ImageChannels.Color) != 0)
{
Marshal.Copy(image.Red, 0, marshalled.decoded, n);
Marshal.Copy(image.Green, 0, (IntPtr)(marshalled.decoded.ToInt64() + n), n);
Marshal.Copy(image.Blue, 0, (IntPtr)(marshalled.decoded.ToInt64() + n * 2), n);
}
if ((image.Channels & ManagedImage.ImageChannels.Alpha) != 0) Marshal.Copy(image.Alpha, 0, (IntPtr)(marshalled.decoded.ToInt64() + n * 3), n);
if ((image.Channels & ManagedImage.ImageChannels.Bump) != 0) Marshal.Copy(image.Bump, 0, (IntPtr)(marshalled.decoded.ToInt64() + n * 4), n);
// codec will allocate output buffer
if (!LibslEncode(ref marshalled, lossless))
throw new Exception("LibslEncode failed");
// copy output buffer
byte[] encoded = new byte[marshalled.length];
Marshal.Copy(marshalled.encoded, encoded, 0, marshalled.length);
// free buffers
LibslFree(ref marshalled);
return encoded;
}
public static unsafe ManagedImage LoadTGAImage(System.IO.Stream source, bool mask)
{
byte[] buffer = new byte[source.Length];
source.Read(buffer, 0, buffer.Length);
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer);
System.IO.BinaryReader br = new System.IO.BinaryReader(ms);
tgaHeader header = new tgaHeader();
header.Read(br);
if (header.ImageSpec.PixelDepth != 8 &&
header.ImageSpec.PixelDepth != 16 &&
header.ImageSpec.PixelDepth != 24 &&
header.ImageSpec.PixelDepth != 32)
throw new ArgumentException("Not a supported tga file.");
if (header.ImageSpec.AlphaBits > 8)
throw new ArgumentException("Not a supported tga file.");
if (header.ImageSpec.Width > 4096 ||
header.ImageSpec.Height > 4096)
throw new ArgumentException("Image too large.");
byte[] decoded = new byte[header.ImageSpec.Width * header.ImageSpec.Height * 4];
System.Drawing.Imaging.BitmapData bd = new System.Drawing.Imaging.BitmapData();
fixed (byte* pdecoded = &decoded[0])
{
bd.Width = header.ImageSpec.Width;
bd.Height = header.ImageSpec.Height;
bd.PixelFormat = System.Drawing.Imaging.PixelFormat.Format32bppPArgb;
bd.Stride = header.ImageSpec.Width * 4;
bd.Scan0 = (IntPtr)pdecoded;
switch (header.ImageSpec.PixelDepth)
{
case 8:
decodeStandard8(bd, header, br);
break;
case 16:
if (header.ImageSpec.AlphaBits > 0)
decodeSpecial16(bd, header, br);
else
decodeStandard16(bd, header, br);
break;
case 24:
if (header.ImageSpec.AlphaBits > 0)
decodeSpecial24(bd, header, br);
else
decodeStandard24(bd, header, br);
break;
case 32:
decodeStandard32(bd, header, br);
break;
default:
return null;
}
}
int n = header.ImageSpec.Width * header.ImageSpec.Height;
ManagedImage image;
if (mask && header.ImageSpec.AlphaBits == 0 && header.ImageSpec.PixelDepth == 8)
{
image = new ManagedImage(header.ImageSpec.Width, header.ImageSpec.Height,
ManagedImage.ImageChannels.Alpha);
int p = 3;
for (int i = 0; i < n; i++)
{
image.Alpha[i] = decoded[p];
p += 4;
}
}
else
{
image = new ManagedImage(header.ImageSpec.Width, header.ImageSpec.Height,
ManagedImage.ImageChannels.Color | ManagedImage.ImageChannels.Alpha);
int p = 0;
for (int i = 0; i < n; i++)
{
image.Blue[i] = decoded[p++];
image.Green[i] = decoded[p++];
image.Red[i] = decoded[p++];
image.Alpha[i] = decoded[p++];
}
}
br.Close();
return image;
}
public ManagedImage Clone()
{
ManagedImage image = new ManagedImage(Width, Height, Channels);
if (Red != null) image.Red = (byte[])Red.Clone();
if (Green != null) image.Green = (byte[])Green.Clone();
if (Blue != null) image.Blue = (byte[])Blue.Clone();
if (Alpha != null) image.Alpha = (byte[])Alpha.Clone();
if (Bump != null) image.Bump = (byte[])Bump.Clone();
return image;
}
/// <summary>
/// Encode a <seealso cref="System.Drawing.Bitmap"/> object into a byte array
/// </summary>
/// <param name="bitmap">The source <seealso cref="System.Drawing.Bitmap"/> object to encode</param>
/// <param name="lossless">true to enable lossless decoding</param>
/// <returns>A byte array containing the source Bitmap object</returns>
public unsafe static byte[] EncodeFromImage(Bitmap bitmap, bool lossless)
{
BitmapData bd;
ManagedImage decoded;
int bitmapWidth = bitmap.Width;
int bitmapHeight = bitmap.Height;
int pixelCount = bitmapWidth * bitmapHeight;
int i;
if ((bitmap.PixelFormat & PixelFormat.Alpha) != 0 || (bitmap.PixelFormat & PixelFormat.PAlpha) != 0)
{
// Four layers, RGBA
decoded = new ManagedImage(bitmapWidth, bitmapHeight,
ManagedImage.ImageChannels.Color | ManagedImage.ImageChannels.Alpha);
bd = bitmap.LockBits(new Rectangle(0, 0, bitmapWidth, bitmapHeight),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
byte* pixel = (byte*)bd.Scan0;
for (i = 0; i < pixelCount; i++)
{
// GDI+ gives us BGRA and we need to turn that in to RGBA
decoded.Blue[i] = *(pixel++);
decoded.Green[i] = *(pixel++);
decoded.Red[i] = *(pixel++);
decoded.Alpha[i] = *(pixel++);
}
}
else if (bitmap.PixelFormat == PixelFormat.Format16bppGrayScale)
{
// One layer
decoded = new ManagedImage(bitmapWidth, bitmapHeight,
ManagedImage.ImageChannels.Color);
bd = bitmap.LockBits(new Rectangle(0, 0, bitmapWidth, bitmapHeight),
ImageLockMode.ReadOnly, PixelFormat.Format16bppGrayScale);
byte* pixel = (byte*)bd.Scan0;
for (i = 0; i < pixelCount; i++)
{
// Normalize 16-bit data down to 8-bit
ushort origVal = (byte)(*(pixel) + (*(pixel + 1) << 8));
byte val = (byte)(((double)origVal / (double)UInt32.MaxValue) * (double)Byte.MaxValue);
decoded.Red[i] = val;
decoded.Green[i] = val;
decoded.Blue[i] = val;
pixel += 2;
}
}
else
{
// Three layers, RGB
decoded = new ManagedImage(bitmapWidth, bitmapHeight,
ManagedImage.ImageChannels.Color);
bd = bitmap.LockBits(new Rectangle(0, 0, bitmapWidth, bitmapHeight),
ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
byte* pixel = (byte*)bd.Scan0;
for (i = 0; i < pixelCount; i++)
{
decoded.Blue[i] = *(pixel++);
decoded.Green[i] = *(pixel++);
decoded.Red[i] = *(pixel++);
}
}
bitmap.UnlockBits(bd);
byte[] encoded = Encode(decoded, lossless);
return encoded;
}
/// <summary>
///
/// </summary>
/// <param name="encoded"></param>
/// <param name="managedImage"></param>
/// <returns></returns>
public static bool DecodeToImage(byte[] encoded, out ManagedImage managedImage)
{
MarshalledImage marshalled = new MarshalledImage();
// Allocate and copy to input buffer
marshalled.length = encoded.Length;
LibslAllocEncoded(ref marshalled);
Marshal.Copy(encoded, 0, marshalled.encoded, encoded.Length);
// Codec will allocate output buffer
LibslDecode(ref marshalled);
int n = marshalled.width * marshalled.height;
switch (marshalled.components)
{
case 1: // Grayscale
managedImage = new ManagedImage(marshalled.width, marshalled.height,
ManagedImage.ImageChannels.Color);
Marshal.Copy(marshalled.decoded, managedImage.Red, 0, n);
Buffer.BlockCopy(managedImage.Red, 0, managedImage.Green, 0, n);
Buffer.BlockCopy(managedImage.Red, 0, managedImage.Blue, 0, n);
break;
case 2: // Grayscale + alpha
managedImage = new ManagedImage(marshalled.width, marshalled.height,
ManagedImage.ImageChannels.Color | ManagedImage.ImageChannels.Alpha);
Marshal.Copy(marshalled.decoded, managedImage.Red, 0, n);
Buffer.BlockCopy(managedImage.Red, 0, managedImage.Green, 0, n);
Buffer.BlockCopy(managedImage.Red, 0, managedImage.Blue, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)n), managedImage.Alpha, 0, n);
break;
case 3: // RGB
managedImage = new ManagedImage(marshalled.width, marshalled.height,
ManagedImage.ImageChannels.Color);
Marshal.Copy(marshalled.decoded, managedImage.Red, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)n), managedImage.Green, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)(n * 2)), managedImage.Blue, 0, n);
break;
case 4: // RGBA
managedImage = new ManagedImage(marshalled.width, marshalled.height,
ManagedImage.ImageChannels.Color | ManagedImage.ImageChannels.Alpha);
Marshal.Copy(marshalled.decoded, managedImage.Red, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)n), managedImage.Green, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)(n * 2)), managedImage.Blue, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)(n * 3)), managedImage.Alpha, 0, n);
break;
case 5: // RGBBA
managedImage = new ManagedImage(marshalled.width, marshalled.height,
ManagedImage.ImageChannels.Color | ManagedImage.ImageChannels.Alpha | ManagedImage.ImageChannels.Bump);
Marshal.Copy(marshalled.decoded, managedImage.Red, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)n), managedImage.Green, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)(n * 2)), managedImage.Blue, 0, n);
// Bump comes before alpha in 5 channel encode
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)(n * 3)), managedImage.Bump, 0, n);
Marshal.Copy((IntPtr)(marshalled.decoded.ToInt64() + (long)(n * 4)), managedImage.Alpha, 0, n);
break;
default:
Logger.Log("Decoded image with unhandled number of components: " + marshalled.components,
Helpers.LogLevel.Error);
LibslFree(ref marshalled);
managedImage = null;
return false;
}
LibslFree(ref marshalled);
return true;
}
/// <summary>
/// Decode JPEG2000 data to an <seealso cref="System.Drawing.Image"/> and
/// <seealso cref="ManagedImage"/>
/// </summary>
/// <param name="encoded">JPEG2000 encoded data</param>
/// <param name="managedImage">ManagedImage object to decode to</param>
/// <param name="image">Image object to decode to</param>
/// <returns>True if the decode succeeds, otherwise false</returns>
public static bool DecodeToImage(byte[] encoded, out ManagedImage managedImage, out Image image)
{
managedImage = null;
image = null;
if (DecodeToImage(encoded, out managedImage))
{
try
{
image = LoadTGAClass.LoadTGA(new MemoryStream(managedImage.ExportTGA()));
return true;
}
catch (Exception ex)
{
Logger.Log("Failed to export and load TGA data from decoded image", Helpers.LogLevel.Error, ex);
return false;
}
}
else
{
return false;
}
}
/// <summary>
/// Encode a <seealso cref="ManagedImage"/> object into a byte array
/// </summary>
/// <param name="image">The <seealso cref="ManagedImage"/> object to encode</param>
/// <returns>a byte array of the encoded image</returns>
public static byte[] Encode(ManagedImage image)
{
return Encode(image, false);
}
public AssetTexture(ManagedImage image)
{
Image = image;
}
